Own Theme (based on Starkers): No text formatting in WP possible

hey,

i just created a wordpress theme based on the naked theme “Starkers”. After i finished the work i uploaded and activated it. All worked…but one.
I recognized this problem, after i wrote the first post. I can’t do any formatting to the text. For example when i want to create a list with

<ol>
<li></li>
<li></li>
</ol>

in WP-HTML editor i get no list in the post (when i switch after the input in the HTML editor to the visible mode in WP it’s displayed there correctly).
With other themes it’s working.
With the original “Starkers” theme it’s also not working (the list isn’t displayed).
When i go to my page and look at my source code there stands the html code for the list

<ol>
<li>1</li>
<li>2</li>
</ol>

; but as said in the browser there’s only 1 2 insead of 1.1 2.2

Anybody an idea? When some code is needed pls ask me.

greeting